Zobrazeno 1 - 10
of 545
pro vyhledávání: '"A Skenderis"'
We show that AdS amplitudes are CFT correlators to all orders in the loop expansion by showing that they obey the conformal Ward identities. In particular, we provide explicit formulas for the constants and functions of cross-ratios that determine th
Externí odkaz:
http://arxiv.org/abs/2412.09503
Publikováno v:
JHEP08(2024)226
We discuss the flat space limit of AdS using the momentum space representation of CFT correlators. The flat space limit involves sending the AdS radius and the dimensions of operators dual to massive fields to infinity while also scaling appropriatel
Externí odkaz:
http://arxiv.org/abs/2406.06447
Publikováno v:
JHEP 05 (2024) 053
We formulate a renormalisation procedure for IR divergences of tree-level in-in late-time de Sitter correlators. These divergences are due to the infinite volume of spacetime and are analogous to the divergences that appear in AdS dealt with by holog
Externí odkaz:
http://arxiv.org/abs/2312.17316
We present a new formalism to solve the kinematical constraints due to Weyl invariance for CFTs in curved backgrounds and/or non-trivial states, and we apply it to thermal CFTs and to CFTs on squashed spheres. The ambient space formalism is based on
Externí odkaz:
http://arxiv.org/abs/2312.03820
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-68 (2024)
Abstract We discuss the flat space limit of AdS using the momentum space representation of CFT correlators. The flat space limit involves sending the AdS radius and the dimensions of operators dual to massive fields to infinity while also scaling app
Externí odkaz:
https://doaj.org/article/dfbdbf9d8c0841a0ad1686d471ad6b4a
We analyse the 3-point CFT correlators involving non-conserved spinning operators in momentum space. We derive a general expression for the conformal Ward identities defining the 3-point functions involving two generic spin $s$ non-conserved operator
Externí odkaz:
http://arxiv.org/abs/2212.13135
Autor:
Rocha, Henrique Bergallo, Del Debbio, Luigi, Jüttner, Andreas, Kitching-Morley, Ben, Lee, Joseph K. L., Portelli, Antonin, Skenderis, Kostas
There is increasing interest in the study of nonperturbative aspects of three-dimensional quantum field theories (QFT). They appear as holographic dual to theories of (strongly coupled) gravity. For instance, in Holographic Cosmology, the two-point f
Externí odkaz:
http://arxiv.org/abs/2212.09469
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-76 (2024)
Abstract We present a new formalism to solve the kinematical constraints due to Weyl invariance for CFTs in curved backgrounds and/or non-trivial states, and we apply it to thermal CFTs and to CFTs on squashed spheres. The ambient space formalism is
Externí odkaz:
https://doaj.org/article/aa32df1c82dc455f86af077c361c5af4
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-85 (2024)
Abstract We formulate a renormalisation procedure for IR divergences of tree-level in-in late-time de Sitter (dS) correlators. These divergences are due to the infinite volume of spacetime and are analogous to the divergences that appear in AdS dealt
Externí odkaz:
https://doaj.org/article/4a42e6b9b04d4eef8d31fc47671b417b
We present a generalisation of the embedding space formalism to conformal field theories (CFTs) on non-trivial states and curved backgrounds, based on the ambient metric of Fefferman and Graham. The ambient metric is a Lorentzian Ricci-flat metric in
Externí odkaz:
http://arxiv.org/abs/2209.09250